growing pains
Noun
Meaning
problems that arise in enlarging an enterprise (especially in the early stages)
emotional distress arising during adolescence
pain in muscles or joints sometimes experienced by children and often attributed to rapid growth
Source: WordNetHypernyms
Examples
A team with this much youth is bound to go through growing pains.
And there’s a lot of shifting and a lot of growing pains and a lot of changes.
Arya complained of stomach aches in May this year and her parents assumed it was growing pains.
Cayman has had its fair share of growing pains, including natural disasters and, sadly, poor political leadership that has stymied its growth economically and socially.
A funny story about growing pains, with a twist or three.
Aberdeen experienced some growing pains Friday night as the youthful Bulldogs dropped a 35-8 decision to New Hope.